12. From the list given below pick the item that is not a natural resource(A)Soil(B) Water(C) Electricity (D) Air

13. The most rapidly dwindling natural resource in the world is(A)Water(B) Wind(C) Forests(D) Sunlight14. A particle is moving in a circular path of radius r. The displacement after half a circle would be(A)2 r(B) Zero(C) r(D) 2r

16. Which is diffraction?(A)Superposition of dispersed light(B) Bending of light rays at the corners(C) Partial absorption of light(D) None of the above

17. A car moves at 80km/hr in the first half of the total time of motion and at 40km/hr in the later half. Its average speed is(A)30km/hr(B) 40km/hr(C) 60km/hr(D) 120km/hr18. Colour-blindness is inability to distinguished colours(A)Red-blue(B) Red-yellow(C) Red-green(D) Blue-green

19. Chicken-pox is a disease caused by

(A)Virus

(B) Bacteria

(C) Protozoa

(D) Fungi

20. It is not advisable to sleep under a tree at night because of

(A)Release of less oxygen

(B) Release of more oxygen

(C) Release of carbon dioxide

(D) Release of carbon monoxide

21. Aqueous solution of SO2 is

(A)Acidic

(B) Basic

(C) Neutral

(D) Amphoteric

22. Person taking rich diet of ascorbic acid will not suffer from

(A)Rickets

(B) Pellagra

(C) Scurvy

(D) Beri-Beri

23. Other than nucleus which cellular organelle contains DNA?

(A)Ribosome

(B) Golgi complex

(C) Mitochondria

(D) Lysosome

24. In the absence of light, what will increase?

(A)Water uptake

(B) Elongation of internodes

(C) Uptake of mineral salts

(D) Extension of leaf lamina

25. Marsh gas is

(A)Methane

(B) Ethane

(C) Propane

(D) Butane

26. Rusting of iron is

(A)Reduction reaction

(B) Oxidation reaction

(C) Redox reaction

(D) Displacement reaction

27. Petroleum is refined by

(A)Simple distillation

(B) Fractional distillation

(C) Steam distillation

(D) Vacuum distillation

28. Which one of the following is known as Bayer’s Reagent?

(A)Dilute alkaline solution of potassium permanganate

(B) Concentrated acidic solution of potassium permanganate

(C) Acidic solution of potassium permanganate

(D) Neutral solution of potassium permanganate

29. The pseudopodia of amoeba are used for

(A)Movement

(B) Movement and capture of food

(C) Sensing the food

(D) Capture of food

30. Which of the following is not a “green house gas”?

(A)SO2

(B) CFC

(C) CH4

(D) N2O

31. A ball at a place where g = 10m/s2 is thrown up with a speed of 20 m/s. How high it will go before it begins to fall?

(A)40 m

(B) 20 m

(C) 10 m

(D) 200m

32. With the increase in temperature the resistance of a conductor

(A)Decreases

(B) Increases

(C) Remains the same

(D) None of these

33. A body of mass 4 kg is projected vertically with a speed 3m/s. The maximum gravitational energy of the body is

(A)18 J

(B) 4.5 J

(C) 9 J

(D) 2.25 J

34. Which of the following statement is not true for a geo-stationary satellite of the earth?

(A)Such a satellite is stationery in space

(B) Its angular speed is equal to that of earth about its own axis.

(C) Its time period is 24 hours

(D) It revolves around earth from west to east.

35. Two water droplets merge with each other to form a larger droplet. In this process

(A)Energy is absorbed.

(B) Energy is liberated.

(C) Energy is neither liberated nor absorbed.

(D) Some mass is converted into energy

36. It is hotter at the same distance over the top of a fire than it is on the side of it, mainly because